US4208495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition useful in making extensible films
Assignee: PPG Industries Inc
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Filing: 1978-11-29
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Granted: 1980-06-17
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Expires: 1998-11-29
Abstract
Abstract Cured coatings having a high degree of extensibility, gloss retention, good sprayability and other desirable properties are obtained from compositions comprising (A) an interpolymer of a hydroxyalkyl ester of an ethylenically-unsaturated carboxylic acid and a copolymerizable material; (B) an organic polyisocyanate; (C) a polymeric polyol of low glass transition temperature; and (D) a curing agent, present either externally and/or as a part of the interpolymer. These compositions, when used as coatings, are durable, adherent and highly extensible. The coatings are particularly useful on resilient and rubbery substrates such as EPDM rubber, foam rubber, polyurethane foam and vinyl foam and on soft metal surfaces such as steel and aluminum.
Inventors
- 👤 Wen-Hsuan Chang
- 👤 J. Alden Erikson
- 👤 Samuel Porter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/4009; C08G18/4063; C08G18/62; C08G18/6216; C08G18/622; C09; C09D; C09D175/00; C09D175/04; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
A curable coating composition comprising: (a) an ungelled reaction product of: (1) an organic polyisocyanate, (2) a polymeric polyol having a glass transition temperature of less than 50° C., and (3) an interpolymer of: (i) a hydroxyalkyl ester of an ethylenically unsaturated carboxylic acid; and (ii) at least one other copolymerizable ethylenically unsaturated monomer; said interpolymer being different from said polymeric polyol; when said polymeric polyol is a polymeric acrylic polyol, the polymeric acrylic polyol having a glass transition temperature at least 10° C. lower than that of the interpolymer; the equivalent ratio of isocyanate groups in (1) to hydroxyl groups in (2) and (3) being between 1:1.1 and about 1:9; and (B) a blocked polyisocyanate or masked polyisocyanate curing agent.
Claim 2
Dependent Claim
121 words
A curable coating composition comprising: (a) an ungelled reaction product of: (1) an organic polyisocyanate, (2) a polymeric polyol having a glass transition temperature of less than 50° C., and (3) an interpolymer of: (i) a hydroxyalkyl ester of an ethylenically unsaturated carboxylic acid; and (ii) at least one other copolymerizable ethylenically unsaturated monomer; said interpolymer being different from said polymeric polyol; when said polymeric polyol is a polymeric acrylic polyol, the polymeric acrylic polyol having a glass transition temperature at least 10° C. lower than that of the interpolymer; the equivalent ratio of isocyanate groups in (1) to hydroxyl groups in (2) and (3) being between 1:1.1 and about 1:9; and (B) a blocked polyisocyanate or masked polyisocyanate curing agent.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein said hydroxyalkyl ester is selected from the group consisting of hydroxyalkyl acrylates and methacrylates.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein said polymeric polyol has a molecular weight of from 200 to 5000.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein said polymeric polyol is a polyether polyol.
Claim 6
Dependent Claim
13 words
The composition of claim 4 wherein said polyether polyol is a poly(oxyalkylene) glycol.
Claim 7
Dependent Claim
13 words
The composition of claim 5 wherein said poly(oxyalkylene) glycol is a poly(oxytetramethylene) glycol.
Claim 8
Dependent Claim
20 words
The composition of claim 3 additionally containing a low molecular weight polyol having a molecular weight of less than 200.
Claim 9
Dependent Claim
13 words
The composition of claim 3 wherein said polymeric polyol is a polyester polyol.
Claim 10
Dependent Claim
20 words
The composition of claim 8 wherein said polyester polyol is the reaction product of an aliphatic acid and neopentyl glycol.
Claim 11
Dependent Claim
17 words
The composition of claim 3 wherein said polymeric polyol is a condensate of caprolactone and a polyalcohol.
Claim 12
Dependent Claim
29 words
The composition of claim 1 wherein said polymeric polyol is a polyurethane polyol formed from reacting a polyisocyanate with a polyol having a molecular weight between 200 and 5000.
Claim 13
Dependent Claim
31 words
The composition of claim 1 wherein said polymeric polyol is a hydroxy-contaning acrylic polymer having a glass transition temperature which is at least 10° C. lower than that of the interpolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |